package com.ydkj.a37e_mall.Resource.View;

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.View;

import com.mob.tools.gui.ViewPagerAdapter;

/**
 * ViewPager wrapContent解决方案
 */
public class WrapContentHeightViewPager extends ViewPager {

	/**
	 * Constructor
	 * 
	 * @param context
	 *            the context
	 */
	public WrapContentHeightViewPager(Context context) {
		super(context);
	}

	/**
	 * Constructor
	 * 
	 * @param context
	 *            the context
	 * @param attrs
	 *            the attribute setting
	 */
	public WrapContentHeightViewPager(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	// @Override
	// protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
	// super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	//
	// // find the first child view
	// View view = getChildAt(0);
	// if (view != null) {
	// // measure the first child view with the specified measure spec
	// view.measure(widthMeasureSpec, heightMeasureSpec);
	// }
	//
	// setMeasuredDimension(getMeasuredWidth(), measureHeight(heightMeasureSpec,
	// view));
	// }
	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

		int height = 0;
		for (int i = 0; i < getChildCount(); i++) {
			View child = getChildAt(i);
			child.measure(widthMeasureSpec,
					MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
			int h = child.getMeasuredHeight();
			if (h > height)
				height = h;
		}

		heightMeasureSpec = MeasureSpec.makeMeasureSpec(height,
				MeasureSpec.EXACTLY);

		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
	}

	/**
	 * Determines the height of this view
	 * 
	 * @param measureSpec
	 *            A measureSpec packed into an int
	 * @param view
	 *            the base view with already measured height
	 * 
	 * @return The height of the view, honoring constraints from measureSpec
	 */
	private int measureHeight(int measureSpec, View view) {
		int result = 0;
		int specMode = MeasureSpec.getMode(measureSpec);
		int specSize = MeasureSpec.getSize(measureSpec);

		if (specMode == MeasureSpec.EXACTLY) {
			result = specSize;
		} else {
			// setting the height from the base view if available
			if (view != null) {
				result = view.getMeasuredHeight();
			}
			if (specMode == MeasureSpec.AT_MOST) {
				result = Math.min(result, specSize);
			}
		}
		return result;
	}


}